Disclaimer: level and art entirely courtesy of the original Riders team and ported by Sapheros. lua was made entirely from scratch, however.
Final release probably won't feature the original levels or sprites.

Bonus:
Preview of a remake of Metal City Tripel The Fox is working on for this!

Now, custom flight! This brings just about every custom system complete, aside from some stage specific stuff and the HUD. From here, the biggest roadblocks to release are simply the maps. That isn't to say there isn't more to come on the Lua side, however...